From 662a9997c1aa20c94f296d5968fdceaa79d79ce5 Mon Sep 17 00:00:00 2001
From: shenglian zhou <slzhou@taosdata.com>
Date: Tue, 26 Jul 2022 10:39:58 +0800
Subject: [PATCH] fix: set null when all inputs are null for leastsquare
 function

---
 source/libs/function/src/builtinsimpl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index b6fe5b9998..92f9bdd1b2 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -2218,6 +2218,7 @@ int32_t leastSQRFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
   int32_t currentRow = pBlock->info.rows;
 
   if (0 == pInfo->num) {
+    colDataAppendNULL(pCol, currentRow);
     return 0;
   }
 
-- 
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